Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/nats-io/nkeys/errors.go

@@ -0,0 +1,50 @@
+// Copyright 2022 The NATS Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package nkeys
+
+// Errors
+const (
+	ErrInvalidPrefixByte        = nkeysError("nkeys: invalid prefix byte")
+	ErrInvalidKey               = nkeysError("nkeys: invalid key")
+	ErrInvalidPublicKey         = nkeysError("nkeys: invalid public key")
+	ErrInvalidPrivateKey        = nkeysError("nkeys: invalid private key")
+	ErrInvalidSeedLen           = nkeysError("nkeys: invalid seed length")
+	ErrInvalidSeed              = nkeysError("nkeys: invalid seed")
+	ErrInvalidEncoding          = nkeysError("nkeys: invalid encoded key")
+	ErrInvalidSignature         = nkeysError("nkeys: signature verification failed")
+	ErrCannotSign               = nkeysError("nkeys: can not sign, no private key available")
+	ErrPublicKeyOnly            = nkeysError("nkeys: no seed or private key available")
+	ErrIncompatibleKey          = nkeysError("nkeys: incompatible key")
+	ErrInvalidChecksum          = nkeysError("nkeys: invalid checksum")
+	ErrNoSeedFound              = nkeysError("nkeys: no nkey seed found")
+	ErrInvalidNkeySeed          = nkeysError("nkeys: doesn't contain a seed nkey")
+	ErrInvalidUserSeed          = nkeysError("nkeys: doesn't contain an user seed nkey")
+	ErrInvalidRecipient         = nkeysError("nkeys: not a valid recipient public curve key")
+	ErrInvalidSender            = nkeysError("nkeys: not a valid sender public curve key")
+	ErrInvalidCurveKey          = nkeysError("nkeys: not a valid curve key")
+	ErrInvalidCurveSeed         = nkeysError("nkeys: not a valid curve seed")
+	ErrInvalidEncrypted         = nkeysError("nkeys: encrypted input is not valid")
+	ErrInvalidEncVersion        = nkeysError("nkeys: encrypted input wrong version")
+	ErrCouldNotDecrypt          = nkeysError("nkeys: could not decrypt input")
+	ErrInvalidCurveKeyOperation = nkeysError("nkeys: curve key is not valid for sign/verify")
+	ErrInvalidNKeyOperation     = nkeysError("nkeys: only curve key can seal/open")
+	ErrCannotOpen               = nkeysError("nkeys: cannot open no private curve key available")
+	ErrCannotSeal               = nkeysError("nkeys: cannot seal no private curve key available")
+)
+
+type nkeysError string
+
+func (e nkeysError) Error() string {
+	return string(e)
+}